CN219890676U - Lithium battery tightness detection equipment - Google Patents

Abstract

The utility model discloses lithium battery tightness detection equipment, and belongs to the field of battery detection. The technical scheme includes that the lithium battery tightness detection device comprises a detection table, wherein a detection chamber with an opening at the upper end is fixedly connected to the detection table, a first window is arranged on the detection chamber and the side part, a sealing part for sealing the first window is rotatably connected to the outside of the detection chamber, the sealing part comprises a sleeve, and a second window matched with the first window is arranged on the side wall of the sleeve; according to the utility model, the detection chamber can form a closed cavity through rotating the sleeve, the operation is simple, the efficiency of tightness detection is improved, the device is convenient to use, the structure of the device is compact through the matching mode between the sleeve and the detection chamber, the space occupation of the device is reduced, the device is convenient to carry, the tightness of the connecting seam between the sleeve and the detection chamber is increased through the arrangement of the sealing assembly, and the accuracy of the detection result is improved.

Description

Lithium battery tightness detection equipment

Technical Field

The utility model belongs to the technical field of battery detection, and particularly relates to lithium battery tightness detection equipment.

Background

The lithium ion battery has the advantages of high voltage, high specific capacity, environmental friendliness, multiple cycle times and the like, and is widely applied to the fields of portable electronic equipment, electric automobiles and the like. The lithium ion battery is provided with a sealing performance detection procedure after sealing, and the procedure mainly detects whether the lithium battery pack has insufficient sealing performance, so that the lithium battery with poor sealing performance is prevented from flowing into the market, leakage of electrolyte in the battery in the charging and discharging process of the lithium battery is fundamentally prevented, and certain potential safety hazards are caused for users.

In the prior art, the patent application number CN202220571047.3 discloses a lithium battery tightness detection device, ventilation and pressurization are carried out in a detection cavity through an air inlet pipe to enable a lithium battery in water to bear certain water pressure, if the battery tightness is poor, water vapor can enter the battery, water can react with electrolyte and a negative electrode in the battery to continuously generate gas, so that a square aluminum shell battery shell is inflated and a square soft package battery is inflated, the battery tightness is detected through the principle, the bad sealing battery can be effectively detected, the occurrence of a missing detection phenomenon is avoided, and the problem of outflow of the bad sealing battery is effectively solved.

The application has the following disadvantages in the process of detecting the lithium battery:

1. the air tightness of the battery is detected by adopting a water injection mode, the battery is easy to be wetted, and the aim of detecting the tightness can be fulfilled, however, the battery with poor tightness can be maintained after being detected so that the tightness of the battery can reach the sealing standard, however, after the battery with unqualified tightness is detected, the battery shell can be directly scrapped due to bulge, and the maintenance can not be performed or the maintenance cost is increased.

2. In the prior art, the kettle cover is complex in mounting and dismounting process, and the detection efficiency is low.

3. In the prior art, when a battery with poor tightness is detected, part of water can enter the battery shell, so that the pressure in the detection kettle is reduced to a certain extent, and when the influence of gas continuously generated by water reaction on the pressure in the detection kettle is greater than the influence of water entering the battery shell on the pressure in the detection kettle, the detection result with poor tightness can be obtained, so that a certain error exists in the detection result.

Disclosure of Invention

The utility model provides lithium battery tightness detection equipment for solving at least one of the technical problems.

The technical scheme adopted by the utility model is as follows:

the utility model provides a lithium cell leakproofness check out test set, includes the test bench, fixedly connected with upper end open-ended detection chamber on the test bench, the detection chamber is equipped with first window with the lateral part, the outside rotation of detection chamber is connected with the sealing that is used for sealed first window, sealing includes the sleeve pipe, the sleeve pipe lateral wall has seted up the second window that matches with first window, be equipped with seal assembly between sleeve pipe inner wall and the detection chamber outer wall, be equipped with the atmospheric pressure detection subassembly and the connecting pipe that insert the detection chamber on the sleeve pipe, be connected with the adjustment mechanism who is used for adjusting the indoor air pressure of detection on the connecting pipe.

Preferably, the adjusting mechanism is used for vacuumizing the detection chamber, the adjusting mechanism is a vacuum pump, and an air duct is connected between the air extraction end of the vacuum pump and the connecting pipe.

Preferably, the adjusting mechanism is used for inflating the detection chamber, the adjusting mechanism is an inflator pump, and the inflating end of the inflator pump is connected with the connecting pipe through an air duct.

Preferably, the ball valve is rotationally connected to the air duct, a supporting frame is arranged on the detection table, a driving motor is arranged on the supporting frame, an output shaft is arranged on the driving motor, and the output shaft is connected with the ball valve.

Preferably, a fixed shaft is fixedly connected between the ball valve and the sleeve, the fixed shaft and the sleeve are coaxially arranged, the ball valve rotates to have a first position for enabling the output end of the adjusting mechanism to be communicated with the connecting pipe and a second position for enabling the output end of the adjusting mechanism not to be communicated with the connecting pipe, the first window and the second window are completely dislocated when the ball valve is located at the first position, and the first window and the second window are completely overlapped when the ball valve is located at the second position.

Preferably, the seal assembly comprises a first seal groove and a second seal groove which are arranged on the detection chamber, the first seal groove is located above the first window, a first seal ring is arranged in the first seal groove, the second seal groove is circumferentially arranged along the first window, and a second seal ring is arranged in the second seal groove.

Preferably, a third sealing groove matched with the sleeve is formed in the detection table, an opening at the lower end of the sleeve is in running fit with the third sealing groove, and a third sealing ring is arranged in the third sealing groove.

Preferably, the inside supporting mechanism that is equipped with of detection chamber, supporting mechanism include with detect the inside fixed connection's of room bottom first supporting part and with detect room sliding connection's second supporting part, first supporting part cooperates with the second supporting part in order to support the lithium cell that treats the detection.

Preferably, the second supporting part comprises a guide sliding rail, a guide rod is fixedly connected in the guide sliding rail, a sliding block is connected to the guide rod in a sliding mode, and a supporting clamping plate is fixedly connected to the sliding block.

Preferably, a tension spring is fixedly connected between the sliding block and the inner wall of the guide sliding rail.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. according to the utility model, the detection chamber can form a closed cavity through rotating the sleeve, the operation is simple, the efficiency of tightness detection is improved, the device is convenient to use, the structure of the device is compact through the matching mode between the sleeve and the detection chamber, the space occupation of the device is reduced, the device is convenient to carry, the tightness of the connecting seam between the sleeve and the detection chamber is increased through the arrangement of the sealing assembly, and the accuracy of the detection result is improved.

2. As a preferred embodiment of the utility model, the arrangement of the first sealing groove and the first sealing ring is convenient for sealing the connecting seam between the detection chamber and the side wall of the upper part of the sleeve, so that the air in the detection chamber is prevented from leaking along the connecting seam between the upper opening of the detection chamber and the sleeve, and the air in the detection chamber is prevented from entering the detection chamber along the connecting seam between the upper opening of the detection chamber and the sleeve, thereby ensuring the accuracy of the detection result.

3. As a preferred embodiment of the utility model, the arrangement of the second sealing groove and the second sealing ring is convenient for increasing the tightness between the first window and the inner wall of the sleeve, and prevents air from passing through a gap between the inner wall of the sleeve and the outer wall of the detection chamber and entering the detection chamber from the first window, thereby having a certain influence on the detection result.

4. As a preferred embodiment of the utility model, the arrangement of the third sealing groove and the third sealing ring is convenient for increasing the tightness between the sleeve and the detection table, on the other hand, the third sealing groove also plays a role in limiting the sleeve, so that the stability of the sleeve in the rotation process is increased.

5. As a preferred embodiment of the utility model, the first supporting part and the second supporting part are matched to support the lithium battery to be detected, the bottom of the battery is suspended, so that the connecting seam at the bottom of the battery is not blocked by the inner wall of the bottom of the detection chamber, the reliability of the detection result is improved, and the second supporting part is slid to adjust the interval between the second supporting part and the first supporting part, so that the batteries with different sizes are supported.

Drawings

FIG. 1 is a schematic diagram of a specific embodiment of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present utility model;

FIG. 3 is an enlarged view of portion B of FIG. 1 in accordance with the present utility model;

FIG. 4 is a schematic view of a detection chamber and a sleeve according to an embodiment of the present utility model;

FIG. 5 is a schematic view showing the structure of a detection chamber according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a test bench according to an embodiment of the utility model;

FIG. 7 is a second schematic view of a detection chamber and a sleeve according to an embodiment of the present utility model;

fig. 8 is a schematic view of a ball valve according to an embodiment of the present utility model.

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

In the drawings:

1. a detection table; 102. a support frame; 2. a detection chamber; 201. a first window; 202. a first seal groove; 2021. a first seal ring; 203. a second seal groove; 2031. a second seal ring; 3. a sleeve; 301. a second window; 302. a third seal groove; 3021. a third seal ring; 4. an adjusting mechanism; 401. an air duct; 402. a ball valve; 4021. a fixed shaft; 403. a connecting pipe; 5. a driving motor; 501. an output shaft; 6. an air pressure detection assembly; 7. a guide rail; 701. a first support portion; 702. a guide rod; 703. a slide block; 704. a tension spring; 705. and supporting the clamping plate.

Detailed Description

In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

In addition, in the description of the present utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the descriptions of the terms "implementation," "embodiment," "one embodiment," "example," or "particular example" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1-8, a lithium battery tightness detection device comprises a detection table 1, a detection chamber 2 with an opening at the upper end is fixedly connected to the detection table 1, a first window 201 is arranged on the detection chamber 2 and the side part, a sealing part for sealing the first window 201 is rotatably connected to the outside of the detection chamber 2, the sealing part comprises a sleeve 3, a second window 301 matched with the first window 201 is arranged on the side wall of the sleeve 3, a sealing component is arranged between the inner wall of the sleeve 3 and the outer wall of the detection chamber 2, a pneumatic detection component 6 connected with the detection chamber 2 and a connecting pipe 403 are arranged on the sleeve 3, and an adjusting mechanism 4 for adjusting the air pressure in the detection chamber 2 is connected to the connecting pipe 403.

When the lithium battery tightness detection device is used for detecting tightness of a lithium battery, after the second window 301 on the sleeve 3 is overlapped with the first window 201 on the side wall of the detection chamber 2 through the rotating sleeve 3, the lithium battery to be detected is prevented from forming a closed cavity in the detection chamber 2 through the rotating sleeve 3, the second window 301 and the first window 201 are completely dislocated, at the moment, the outer wall of the sleeve 3 is matched with the sealing component to enable the detection chamber 2 to form a sealing cavity, then air pressure in the detection chamber 2 and internal pressure of a lithium battery shell form a pressure difference through the adjusting mechanism 4, then the sleeve is placed for observing numerical value change of the air pressure detection component 6, if the numerical value of the air pressure detection component 6 does not change in the standing process, the battery tightness is qualified, otherwise, the battery tightness is unqualified, the detection chamber 2 can be formed into a closed cavity through the rotating sleeve 3, the operation is simple, tightness detection efficiency is improved, the device is compact in structure through the matching mode between the sleeve 3 and the detection chamber 2, space occupation of the device is reduced, the device is convenient to carry, the sealing component is convenient to increase, the tightness of the connection seam between the sleeve 3 and the detection chamber 2 is convenient, and the tightness of the detection result is increased.

The specific structure and operation principle of the adjusting mechanism 4 of the present utility model are not particularly limited, and any of the following embodiments may be adopted:

embodiment one: the adjusting mechanism 4 is used for inflating the detection chamber 2, the adjusting mechanism 4 is an inflator, and the inflating end of the inflator is connected with the connecting pipe 403 through the air duct 401.

The air with a certain pressure is filled into the detection chamber 2 through the air pump, so that the pressure in the detection chamber 2 is higher than the internal pressure of the lithium battery, the detection chamber 2 is kept stand for 15 minutes after the detection chamber 2 is pressurized, the air in the detection chamber 2 enters the battery shell when the value of the air pressure detection component 6 is reduced in the standing process, the tightness of the battery shell is unqualified, and the tightness of the battery shell is qualified when the value of the air pressure detection component 6 is unchanged in the standing process.

Embodiment two: the adjusting mechanism 4 is used for vacuumizing the detection chamber 2, the adjusting mechanism 4 is a vacuum pump, and an air duct 401 is connected between an air extraction end of the vacuum pump and the connecting pipe 403.

The air in the detection chamber 2 is pumped out through the vacuum pump, so that the internal pressure of the detection chamber 2 is smaller than the internal pressure of the lithium battery, the detection chamber 2 is kept stand for 15 minutes, when the numerical value of the air pressure detection component 6 is increased in the standing process, the air in the detection chamber 2 enters the battery shell, the tightness of the battery shell is unqualified, and when the numerical value of the air pressure detection component 6 is unchanged in the standing process, the tightness of the battery shell is qualified.

As a preferred embodiment of the present utility model, referring to fig. 1, 3 and 8, a ball valve 402 is rotatably connected to an air duct 401, a support frame 102 is provided to a detection table 1, a driving motor 5 is provided to the support frame 102, an output shaft 501 is provided to the driving motor 5, and the output shaft 501 is connected to the ball valve 402.

The ball valve 402 is driven to rotate by the driving motor 5 and the output shaft 501, so that the ball valve 402 controls the opening and closing of an air flow channel in the air duct 401, and a sealing rubber ring can be arranged on the outer wall of the ball valve 402 to ensure the air tightness of the joint between the ball valve 402 and the air duct 401 when the ball valve 402 seals the air duct 401.

Further, a fixed shaft 4021 is fixedly connected between the ball valve 402 and the sleeve 3, the fixed shaft 4021 and the sleeve 3 are coaxially arranged, so that when the ball valve 402 is driven to rotate by the driving motor 5, the ball valve 402 can also drive the sleeve 3 to rotate by the same angle through the fixed shaft 4021, the ball valve 402 rotates to have a first position for enabling the output end of the adjusting mechanism 4 to be communicated with the connecting pipe 403 and a second position for enabling the output end of the adjusting mechanism 4 not to be communicated with the connecting pipe 403, the first window 201 and the second window 301 are completely misplaced when the ball valve 402 is located at the first position, the detecting chamber 2 is in a sealing state, meanwhile, a passage between the connecting pipe 403 and the air duct 401 is in an opening state, so that the adjusting mechanism 4 can adjust the pressure inside the detecting chamber 2, and when the ball valve 402 is located at the second position, the first window 201 and the second window 301 are completely overlapped, so that a passage between the connecting pipe 403, the air duct 401 and the adjusting mechanism 4 is closed when a worker puts in or takes out a lithium battery into the detecting chamber 2.

As a specific embodiment of the seal assembly in the present utility model, referring to fig. 1 to 6, the seal assembly includes a first seal groove 202 and a second seal groove 203 provided in the inspection chamber 2, the first seal groove 202 is located above the first window 201, a first seal ring 2021 is provided in the first seal groove 202, the second seal groove 203 is provided along the circumferential direction of the first window 201, and a second seal ring 2031 is provided in the second seal groove 203.

The arrangement of the first sealing groove 202 and the first sealing ring 2021 facilitates sealing the connection seam between the detection chamber 2 and the side wall on the upper portion of the sleeve 3, so that air in the detection chamber 2 is prevented from leaking out along the connection seam between the upper opening of the detection chamber 2 and the sleeve 3, and meanwhile, outside air is prevented from entering the detection chamber 2 along the connection seam between the upper opening of the detection chamber 2 and the sleeve 3, the accuracy of detection results is ensured, the arrangement of the second sealing groove 203 and the second sealing ring 2031 facilitates increasing the tightness between the first window 201 and the inner wall of the sleeve 3, and air is prevented from passing through the gap between the inner wall of the sleeve 3 and the outer wall of the detection chamber 2 and entering the detection chamber 2 through the first window 201, so that certain influence is caused on the detection results.

Further, be equipped with on the detection platform 1 with sleeve pipe 3 complex third seal groove 302, sleeve pipe 3 lower extreme opening and third seal groove 302 normal running fit are equipped with third sealing washer 3021 in the third seal groove 302, be convenient for increase sleeve pipe 3 and detect between the platform 1 through the setting of third seal groove 302 and third sealing washer 3021, on the other hand, third seal groove 302 still plays the spacing effect to sleeve pipe 3, increases sleeve pipe 3 rotation in-process stability.

As another preferred embodiment of the present utility model, referring to fig. 1 to 2, 4 and 7, a supporting mechanism is disposed inside the detection chamber 2, and the supporting mechanism includes a first supporting portion 701 fixedly connected to the bottom of the detection chamber 2 and a second supporting portion slidingly connected to the detection chamber 2, where the first supporting portion 701 and the second supporting portion cooperate to support the lithium battery to be detected, so as to ensure that the bottom of the battery is suspended, so that the connection seam of the bottom of the battery is not blocked by the inner wall of the bottom of the detection chamber 2, increase the reliability of the detection result, and adjust the interval between the second supporting portion and the first supporting portion 701 by sliding the second supporting portion, so as to support the battery with different sizes, and care needs to be taken to avoid that the first supporting portion 701 and the second supporting portion do not block the connection seam outside the battery when supporting the battery.

Further, the second supporting part comprises a guiding sliding rail 7, a guiding rod 702 is fixedly connected in the guiding sliding rail 7, a sliding block 703 is slidably connected on the guiding rod 702, a supporting clamping plate 705 is fixedly connected on the sliding block 703, the sliding block 703 is conveniently guided through the guiding sliding rail 7 and the guiding rod 702, and the supporting clamping plate 705 is matched with the first supporting part 701 to support the battery.

The extension springs 704 are fixedly connected between the sliding blocks 703 and the inner walls of the guide sliding rails 7, and it can be understood that the supporting clamping plates 705 and the first supporting portions 701 are L-shaped plates which are oppositely arranged, and through the arrangement of the extension springs 704, the supporting clamping plates 705 can be matched with the first supporting portions 701 to clamp and fix the battery, so that the stability of the first supporting portions 701 and the supporting clamping plates 705 for supporting the battery is guaranteed.

The utility model can be realized by adopting or referring to the prior art at the places which are not described in the utility model.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a lithium cell leakproofness check out test set, includes the test table, its characterized in that, fixedly connected with upper end open-ended detection room on the test table, the detection room is equipped with first window with the lateral part, the outside rotation of detection room is connected with the sealing portion that is used for sealed first window, sealing portion includes the sleeve pipe, the sleeve pipe lateral wall is equipped with the second window of having seted up with first window matching, be equipped with seal assembly between sleeve pipe inner wall and the detection room outer wall, be equipped with the atmospheric pressure detection subassembly and the connecting pipe that inserts the detection room on the sleeve pipe, be connected with the adjustment mechanism who is used for adjusting and detects indoor air pressure on the connecting pipe.

2. The lithium battery tightness detection device according to claim 1, wherein the adjusting mechanism is used for vacuumizing the detection chamber, the adjusting mechanism is a vacuum pump, and an air duct is connected between an air extraction end of the vacuum pump and the connecting pipe.

3. The lithium battery tightness detection device according to claim 1, wherein the adjusting mechanism is used for inflating the detection chamber, the adjusting mechanism is an inflator pump, and an inflating end of the inflator pump is connected with the connecting pipe through an air duct.

4. The lithium battery tightness detection device according to any one of claims 2 or 3, wherein the ball valve is rotationally connected to the air duct, a supporting frame is arranged on the detection table, a driving motor is arranged on the supporting frame, an output shaft is arranged on the driving motor, and the output shaft is connected with the ball valve.

5. The lithium battery tightness detection device according to claim 4, wherein a fixed shaft is fixedly connected between the ball valve and the sleeve, the fixed shaft is coaxially arranged with the sleeve, the ball valve rotates to have a first position for enabling the output end of the adjusting mechanism to be communicated with the connecting pipe and a second position for enabling the output end of the adjusting mechanism to be not communicated with the connecting pipe, the first window and the second window are completely misplaced when the ball valve is located at the first position, and the first window and the second window are completely overlapped when the ball valve is located at the second position.

6. The lithium battery tightness detection device according to any of claims 1-3, wherein the sealing assembly comprises a first sealing groove and a second sealing groove which are arranged on the detection chamber, the first sealing groove is located above the first window, a first sealing ring is arranged in the first sealing groove, the second sealing groove is arranged along the circumferential direction of the first window, and a second sealing ring is arranged in the second sealing groove.

7. The lithium battery tightness detection device according to any of claims 1-3, wherein a third sealing groove matched with a sleeve is arranged on the detection table, an opening at the lower end of the sleeve is in rotary fit with the third sealing groove, and a third sealing ring is arranged in the third sealing groove.

8. A lithium battery tightness detection device according to any of claims 1-3, wherein a supporting mechanism is arranged in the detection chamber, the supporting mechanism comprises a first supporting part fixedly connected with the inside of the bottom of the detection chamber and a second supporting part slidingly connected with the detection chamber, and the first supporting part and the second supporting part are matched to support a lithium battery to be detected.

9. The lithium battery tightness detection device according to claim 8, wherein the second supporting portion comprises a guiding sliding rail, a guiding rod is fixedly connected in the guiding sliding rail, a sliding block is slidingly connected on the guiding rod, and a supporting clamping plate is fixedly connected on the sliding block.

10. The lithium battery tightness detection device according to claim 9, wherein a tension spring is fixedly connected between the sliding block and the inner wall of the guiding sliding rail.